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<HTML><HEAD><TITLE>List Elements</TITLE></HEAD><BODY bgcolor="#FFFFFF"> <a href="../index.html" target="_top"><img src="../icons/usins.gif" alt="Logo" align=right></a><b>Data Structures and Algorithms with Object-Oriented Design Patterns in Python</b><br><A NAME="tex2html2357" HREF="page100.html"><IMG WIDTH=37 HEIGHT=24 ALIGN=BOTTOM ALT="next" SRC="../icons/next_motif.gif"></A> <A NAME="tex2html2355" HREF="page97.html"><IMG WIDTH=26 HEIGHT=24 ALIGN=BOTTOM ALT="up" SRC="../icons/up_motif.gif"></A> <A NAME="tex2html2349" HREF="page98.html"><IMG WIDTH=63 HEIGHT=24 ALIGN=BOTTOM ALT="previous" SRC="../icons/previous_motif.gif"></A>  <A NAME="tex2html2359" HREF="page611.html"><IMG WIDTH=43 HEIGHT=24 ALIGN=BOTTOM ALT="index" SRC="../icons/index_motif.gif"></A> <BR><HR><H2><A NAME="SECTION004320000000000000000">List Elements</A></H2><A NAME="secfdslistelem">&#160;</A><P>The definitions of the methods of the <tt>LinkedList.Element</tt>class are given in Program&nbsp;<A HREF="page98.html#proglinkedLista"><IMG  ALIGN=BOTTOM ALT="gif" SRC="../icons/cross_ref_motif.gif"></A>.Altogether, there are three methods--<tt>__init__</tt>, <tt>getDatum</tt> and <tt>getNext</tt>.<P>The <tt>__init__</tt> method simply initializes the instance attributes to the provided values.Assigning a value to the <tt>_list</tt>, <tt>_datum</tt> and <tt>_next</tt> instance attributestakes a constant amount of time.Therefore, the running time of the <tt>init</tt> method is <I>O</I>(1).<P>The <tt>getDatum</tt> and <tt>getNext</tt> methodssimply return the values of the corresponding instance attributes.Clearly, the running times of each of these methods is <I>O</I>(1).<P><HR><A NAME="tex2html2357" HREF="page100.html"><IMG WIDTH=37 HEIGHT=24 ALIGN=BOTTOM ALT="next" SRC="../icons/next_motif.gif"></A> <A NAME="tex2html2355" HREF="page97.html"><IMG WIDTH=26 HEIGHT=24 ALIGN=BOTTOM ALT="up" SRC="../icons/up_motif.gif"></A> <A NAME="tex2html2349" HREF="page98.html"><IMG WIDTH=63 HEIGHT=24 ALIGN=BOTTOM ALT="previous" SRC="../icons/previous_motif.gif"></A>  <A NAME="tex2html2359" HREF="page611.html"><IMG WIDTH=43 HEIGHT=24 ALIGN=BOTTOM ALT="index" SRC="../icons/index_motif.gif"></A> <P><ADDRESS><img src="../icons/bruno.gif" alt="Bruno" align=right><a href="../copyright.html">Copyright &#169; 2003</a> by <a href="../signature.html">Bruno R. Preiss, P.Eng.</a>  All rights reserved.</ADDRESS></BODY></HTML>

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